1-{4-[5-(2-fluorobiphenyl-4-yl)-1,2,4oxadiazol-3-yl]benzyl}piperidine-4,4-dicarboxylic acid benzyl ester (2,2-dimethylpropanoyloxymethyl) ester 在
钯 氢气 、
四氢呋喃 、 silica gel 、
methanol-dichloromethane 作用下,
以
乙醇 、
乙酸乙酯 为溶剂,
反应 2.5h,
以to give 1-{4-[5-(2-fluorobiphenyl-4-yl)-1,2,4-oxadiazol-3-yl]benzyl}-piperidine-4,4-dicarboxylic acid (2,2-dimethyl-propanoyloxymethyl)ester (e.g. 39)的产率得到1-{4-[5-(2-fluorobiphenyl-4-yl)-1,2,4-oxadiazol-3-yl]benzyl}piperidine-4,4-dicarboxylic acid (2,2-dimethylpropanoyloxymethyl) ester